diff --git a/src/Client.php b/src/Client.php
index 4653aa8..23d6775 100644
--- a/src/Client.php
+++ b/src/Client.php
@@ -708,7 +708,7 @@ protected function _authDigestMD5($user, $pass, $euser)
         }
 
         $this->_sendStringResponse(base64_encode($response));
-        $this->_doCmd('', true);
+        $result = $this->_doCmd('', true);
         if (\Horde_String::upper(substr($result, 0, 2)) == 'OK') {
             return;
         }